It’s the biggest guessing game in town – the identities of at least nine other presumably high-powered, big-bucks johns serviced by Gov. Spitzer’s favorite hooker ring.

An explosive possible “black book” – a who’s who of well-heeled Emperors Club VIP clients – may be in the possession of federal probers, sources said yesterday

The feds’ sensational criminal complaint listing 10 “clients” allegedly includes a top New York judge and even a former law-enforcement official and longtime pal of the disgraced governor, two sources said.

Who’s next to be publicly outed has everyone from Wall Street to the highest echelons of the legal world abuzz.

“But anybody who’s alleged to have been involved in a high-priced call-girl prostitution ring . . . is probably not only wealthy but may be powerful. Those people probably read The Post. Are they quaking in their boots? Oh, definitely. There also might be a lot of unhappy marital conversations going on tonight.”

The club’s johns shelled out at least $1,000 to $5,500 an hour for services from their cream-of-the-crop call girls, who were allegedly handled by two female pimps, Temeka Rachelle Lewis and Tanya Hollander.